Mitsubishi Electric PLA-M35EA Service Manual
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Mitsubishi Electric PLA-M35EA Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
SPLIT-TYPE, AIR CONDITIONERS
SERVICE MANUAL
Indoor unit
[Model Name]
[Service Ref.]
PLA-M35EA.UK
PLA-M35EA
PLA-M50EA.UK
PLA-M50EA
PLA-M60EA.UK
PLA-M60EA
PLA-M71EA.UK
PLA-M71EA
PLA-M100EA.UK
PLA-M100EA
PLA-M125EA.UK
PLA-M125EA
PLA-M140EA.UK
PLA-M140EA
Grille model
[Model Name]
[Service Ref.]
PLP-6EA
PLP-6EA
PLP-6EAE
PLP-6EAE
PLP-6EAL
PLP-6EAL
PLP-6EALE
PLP-6EALE
PLP-6EAJ
PLP-6EAJ
PLP-6EAJE
PLP-6EAJE
PLP-6EALM
PLP-6EALM
PLP-6EALME
PLP-6EALME
Model name
indication for
MAIN UNIT
INDOOR UNIT
PLP-6EAR1
PLP-6EAER1
PLP-6EALR1
PLP-6EALER1
CONTENTS
1. REFERENCE MANUAL ................................... 2
2. SAFETY PRECAUTION ................................... 3
3. PARTS NAMES AND FUNCTIONS ................. 8
4. SPECIFICATIONS ........................................... 13
5. NOISE CRITERION CURVES ......................... 16
6. OUTLINES AND DIMENSIONS ...................... 18
7. WIRING DIAGRAM ......................................... 19
Model name
indication for GRILLE
9. TROUBLESHOOTING .................................... 21
10. FUNCTION SETTING ..................................... 36
11. SPECIAL FUNCTION ..................................... 37
12. DISASSEMBLY PROCEDURE ....................... 43
R32/R410A
PARTS CATALOG (OCB697)
November 2018
No. OCH697

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  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS SPLIT-TYPE, AIR CONDITIONERS November 2018 No. OCH697 SERVICE MANUAL R32/R410A Indoor unit [Model Name] [Service Ref.] PLA-M35EA.UK PLA-M35EA PLA-M50EA.UK PLA-M50EA PLA-M60EA.UK PLA-M60EA PLA-M71EA.UK PLA-M71EA PLA-M100EA.UK PLA-M100EA PLA-M125EA.UK PLA-M125EA PLA-M140EA.UK PLA-M140EA Grille model [Model Name] [Service Ref.]...

  • Page 2: Reference Manual

    REFERENCE MANUAL OUTDOOR UNIT’S SERVICE MANUAL 　Service Ref. Model Name Service Manual No. PUHZ-ZRP35/50VKA2 PUHZ-ZRP35/50VKA2(-ER/ET) OCH635/OCB635 PUHZ-ZRP60/71VHA2 PUHZ-ZRP60/71VHA2(-ER/ET) PUHZ-ZRP100/125/140VKA3 PUHZ-ZRP100/125/140/VKA3.UK PUHZ-ZRP100/125/140YKA3 PUHZ-ZRP100/125/140/YKA3.UK OCH645/OCB645 PUHZ-ZRP200/250YKA2 PUHZ-ZRP200/250YKA2.UK PUHZ-P100/125/140VKA PUHZ-P100/125/140VKA(-ER/ET) OCH670/OCB670 PUHZ-P100/125/140YKA PUHZ-P100/125/140YKA(-ER/ET) PUHZ-P200YKA2 PUHZ-P200YKA2.UK OCH647/OCB647 PUHZ-P250YKA2 PUHZ-P250YKA2.UK PUHZ-SHW112VHA PUHZ-SHW112VHAR4.UK OCH526/OCB526 PUHZ-SHW112/140YHA PUHZ-SHW112/140YHAR4.UK PUZ-ZM200YKA PUZ-ZM200YKA.UK ―...

  • Page 3: Safety Precaution

    SAFETY PRECAUTION MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit. WARNING Read the OPERATION MANUAL carefully before operation. Service personnel are required to carefully read the OPERATION MANUAL and INSTALLATION MANUAL before operation. Further information is available in the OPERATION MANUAL, INSTALLATION MANUAL, and the like.
  • Page 4 [1] Warning for service (1) Do not alter the unit. (2) For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe components specifically made for use with refrigerant specified in the outdoor unit installation manual. (3) Ask a dealer or an authorized technician to install, relocate and repair the unit.
  • Page 5 [4] Cautions for unit using R32 refrigerant Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful attention to the following points. (1) Information on servicing (1-1) Checks on the Area Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.
  • Page 6 (3) Repair to intrinsically Safe Components Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmos- phere.
  • Page 7 a) Become familiar with the equipment and its operation. b) Isolate system electrically. c) Before attempting the procedure, ensure that: • mechanical handling equipment is available, if required, for handling refrigerant cylinders; • all personal protective equipment is available and being used correctly; •...

  • Page 8: Parts Names And Functions

    Unit Electronic weighing scale [5] Service tools Use the below service tools as exclusive tools for R32/R410A refrigerant. Refer to the spec name plate on outdoor unit for the type of refrigerant being used. Tool name Specifications · Use the existing fitting specifications . (UNF1/2) Gauge manifold ·...
  • Page 9 3-2. WIRELESS REMOTE CONTROLLER (Option) Transmission area Not available Remote controller display Battery replacement indicator Set Temperature buttons OFF/ON button Mode button (Changes operation mode) Fan Speed button (Changes fan speed) Airflow button (Changes up/down airflow direction) i-see button Timer ON button Menu button Timer OFF button SET/SEND button...
  • Page 10 3-3. Wired remote controller (Option) PAR-33MAA The functions which can be used are restricted according to each model. The main display can be displayed in 2 different modes: "Full" and "Basic." Display The initial setting is "Full." 1 Operation mode Indoor unit operation mode appears here.
  • Page 11 Menu structure Press the button. MENU Main menu Move the cursor to the desired item with the buttons, and press the button. SELECT Vane · Louver · Vent. (Lossnay) High power Timer ON/OFF timer Auto-OFF timer Weekly timer Restriction Temp. range Operation lock Energy-saving Auto return...
  • Page 12 Setting and display items Setting details Vane · Louver · Vent. Use to set the vane angle. • Select a desired vane setting from 5 different settings. (Lossnay) Use to turn ON/OFF the louver. • Select a desired setting from "ON" and "OFF." Use to set the amount of ventilation.

  • Page 13: Specifications

    SPECIFICATIONS Service Ref. PLA-M35EA.UK Mode Cooling Heating Power supply (phase, cycle, voltage) Single phase, 50Hz, 230 V Input 0.03 0.03 Running current 0.20 0.18 External finish (Grille) Munsell 1.0Y 9.2/0.2 Heat exchanger Plate fin coil Fan (drive) o No. Turbo fan (direct) o 1 Fan motor output 0.050...
  • Page 14 Service Ref. PLA-M71EA.UK Mode Cooling Heating Power supply (phase, cycle, voltage) Single phase, 50Hz, 230 V Input 0.04 0.04 Running current 0.27 0.25 External finish (Grille) Munsell 1.0Y 9.2/0.2 Heat exchanger Plate fin coil Fan (drive) o No. Turbo fan (direct) o 1 Fan motor output 0.05 Airflow (Low-Medium2-Medium1-High)
  • Page 15 Service Ref. PLA-M140EA.UK Mode Cooling Heating Power supply (phase, cycle, voltage) Single phase, 50Hz, 230 V Input 0.10 0.10 Running current 0.66 0.64 External finish (Grille) Munsell 1.0Y 9.2/0.2 Heat exchanger Plate fin coil Fan(drive) o No. Turbo fan (direct) o 1 Fan motor output 0.120 Airflow (Low-Medium2-Medium1-High)

  • Page 16: Noise Criterion Curves

    NOISE CRITERION CURVES PLA-M35EA.UK PLA-M50EA.UK NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High PLA-M60EA.UK Medium1 Medium1 Medium2 Medium2 NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20...
  • Page 17 PLA-M125EA.UK PLA-M140EA.UK NOTCH SPL(dB) LINE NOTCH SPL(dB) LINE High High Medium1 Medium1 Medium2 Medium2 NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR HEARING FOR NC-20 NC-20 CONTINUOUS CONTINUOUS NOISE NOISE 1000 2000 4000...

  • Page 18: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PLA-M35EA.UK PLA-M50EA.UK PLA-M60EA.UK PLA-M71EA.UK PLA-M100EA.UK PLA-M125EA.UK PLA-M140EA.UK Unit: mm OCH697...

  • Page 19: Wiring Diagram

    WIRING DIAGRAM PLA-M35EA.UK PLA-M50EA.UK PLA-M60EA.UK PLA-M71EA.UK PLA-M100EA.UK PLA-M125EA.UK PLA-M140EA.UK [LEGEND] <Table 1> SW1 (MODEL SELECTION) SYMBOL NAME SYMBOL NAME MODELS Manufacture/Service INDOOR CONTROLLER BOARD TERMINAL BLOCK (INDOOR/OUTDOOR PLA- 1 2 3 4 5 6 CN2L CONNECTOR (LOSSNAY) CONNECTING LINE) M.EA...

  • Page 20: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PLA-M35EA.UK PLA-M50EA.UK PLA-M60EA.UK PLA-M71EA.UK PLA-M100EA.UK PLA-M125EA.UK PLA-M140EA.UK Strainer (#50) Heat exchanger Refrigerant GAS pipe connection (Flare) Thermistor TH5 (Cond./ eva.temperature) Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection (Flare) Thermistor TH2 (Pipe temperature/ liquid)

  • Page 21: Troubleshooting

    TROUBLESHOOTING 9-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Present and past check codes are logged, and they can be displayed on the wired remote controller or controller board of out- door unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summa- rized in the table below.
  • Page 22 Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep 1 st 2 nd 3 rd n th 1 st 2 nd OPERATION · · · Repeated INDICATOR lamp blinking pattern...
  • Page 23 • If the unit cannot be operated properly after the test run, refer to the following table to find out the cause. Symptom Cause Wired remote controller • For about 2 minutes after power-on,operation of the For about 2 minutes after power-on PLEASE WAIT remote controller is not possible due to system startup.
  • Page 24 Note: Errors to be detected in outdoor unit, such as codes starting with F, U or E (excluding E0 to E7), are not covered in this document. 9-3. SELF-DIAGNOSIS ACTION TABLE Please refer to the outdoor unit's service manual for the details. Abnormal point and detection method Countermeasure Check code...
  • Page 25 Abnormal point and detection method Countermeasure Check code Cause Drain pump lock protection operation 1 Error postponement, if drain pump stops 1 Malfunction of drain pump 1 Check if drain pump works. for 5 seconds continuously while drain 2 Clogged drain pump 2 Check if drain pump works.
  • Page 26 Abnormal point and detection method Countermeasure Check code Cause Pipe temperature thermistor/ Condenser-Evaporator (TH5) 1–3 Check resistance value of thermistor. For characteristics, refer to (P1). 1 The unit is in 3-minute resume protec- 1 Defective thermistor 2 Check contact failure of connector (CN44) tion mode if short/open of thermistor is characteristics on the indoor controller board.
  • Page 27 Abnormal point and detection method Countermeasure Check code Cause Indoor/outdoor unit communication Note: Check LED display on the outdoor control error (Signal receiving error) circuit board. (Connect A-control service 1 Abnormal if indoor controller board tool, PAC-SK52ST.) 1 Contact failure, short circuit or, cannot receive any signal normally for 6 Refer to outdoor unit service manual.
  • Page 28 Abnormal point and detection method Countermeasure Check code Cause Fan motor trouble 1 Defective fan motor 12 Refer to "9-6-2. DC Fan Motor (FAN 2 Defective indoor controller board MOTOR/INDOOR CONTROLLER BOARD)". Abnormal refrigerant circuit 1 Abnormal operation of 4-way 1 When this error occurs, be sure to replace During Cooling, Dry, or Auto Cooling valve...
  • Page 29 9-4. TROUBLESHOOTING OF PROBLEMS Note: Refer to the outdoor unit's service manual for the detail of remote controller. Phenomena Cause Countermeasure (1) LED2 on indoor controller board • When LED1 on indoor controller board is also off. is off. 1 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power door unit.
  • Page 30 Note: Refer to the outdoor unit's service manual for the detail of remote controller. Phenomena Cause Countermeasure (2) LED2 on indoor controller board • When LED1 on indoor controller board is also blinking. Check indoor/outdoor unit connecting wire is blinking. Connection failure of indoor/outdoor unit connecting for connection failure.
  • Page 31 9-5. EMERGENCY OPERATION 9-5-1. When wireless remote controller fails or its battery is exhausted When the remote controller cannot be used When the batteries of the remote controller run out or the remote control- ler malfunctions, the emergency operation can be done using the emer- gency buttons on the grille.
  • Page 32 9-6. HOW TO CHECK THE PARTS PLA-M35EA.UK PLA-M50EA.UK PLA-M60EA.UK PLA-M71EA.UK PLA-M100EA.UK PLA-M125EA.UK PLA-M140EA.UK Parts name Check method and criterion Room temperature Measure the resistance with a tester. thermistor (TH1) (Parts temperature 10 to 30°C) Pipe temperature Abnormal Normal thermistor/liquid (TH2) Opened or short-circuited 4.3 to 9.6 k"...
  • Page 33 9-6-1. Thermistor < Thermistor for lower temperature > <Thermistor Characteristic Graph> Room temperature thermistor (TH1) Thermistor for Pipe temperature thermistor/liquid (TH2) lower temperature Condenser/evaporator temperature thermistor (TH5) Thermistor R =15k" ± 3% Fixed number of B=3480 ± 2% Rt=15exp { 3480( 273+t 15 k"...
  • Page 34 9-7. TEST POINT DIAGRAM Indoor controller board PLA-M35EA.UK PLA-M50EA.UK PLA-M60EA.UK PLA-M71EA.UK PLA-M100EA.UK PLA-M125EA.UK PLA-M140EA.UK CN5Y i-see Sensor motor (MT) Vane motor (MV) Connect to wired remote controller 12 V pulse output 12 V pulse output 10.4-14.6 V DC Model selection...
  • Page 35 MODEL SETTING Model 1 2 3 4 5 settings PLA-M•EA MODELS SETTING 1 2 3 4 5 PLA-M35EA 1 2 3 4 5 PLA-M50EA 1 2 3 4 5 PLA-M60EA Capacity settings 1 2 3 4 5 PLA-M71EA 1 2 3 4 5...

  • Page 36: Function Setting

    FUNCTION SETTING 10-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set as necessary using the remote controller. The setting of function for each unit can only be done by the remote controller. (1) Functions available when setting the unit number to 00 Refer to the service manual that comes with each outdoor unit.

  • Page 37: Special Function

    SPECIAL FUNCTION 11-1. OPERATION (AUTOMATIC FILTER ELEVATION GRILLE: PLP-6EAJ) (1) Normal operation String 1b 1 UP/DOWN UP/DOWN UP/DOWN Air intake grille is raised/lowered by Machine 1 Machine 2 commands of UP and DOWN. Air intake grille does not move under the state of no-load detection or obstacle detection.
  • Page 38 11-2. ELECTRICAL CIRCUIT (Controller board and wiring diagram (Panel)) 11-2-1 DIP SW LED4 LED2 [ LEGEND ] SYMBOL NAME [EMERGENCY OPERATION] ELEVATION PANEL CONTROLLER BOARD 1. If the wireless remote controller for ELEVATION PANEL is faulty or lost, operation LED ORANGE LED2 will be possible using the emergency up/down switch at the wireless signal receiver (INTAKE GRILLE CONDITION (See table *1))
  • Page 39 11-3. TROUBLESHOOTING • Check the following points. Problem Possible Reason Corrective Action Intake grille does not function Air-conditioner is running. Stop running the air-conditioner and try again. with operation of the remote Power failure After recovering from power failure, try again. controller.
  • Page 40 11-4. ROTATION FUNCTION (AND BACK-UP FUNCTION, 2ND STAGE CUT-IN FUNCTION) 11-4-1. Operation (1) Rotation function (and Back-up function) • Outline of functions · Main and sub unit operate alternately according to the interval of rotation setting. Note: Main and sub unit should be set by refrigerant address. (Outdoor DIP switch setting) Refrigerant address "00"...
  • Page 41 • System constraint · This function is available only in cooling mode. Ex.) Set temp. by R/C = 20: [2nd stage cut-in function]··· Request code number "322–324" Set point = 26: When request code number is “323”. Room temp. ] Set point Room temp.
  • Page 42 (2) Rotation and back up operation PAR-3xMAA ("x" represents 0 or later) Press the button. Main Main menu Maintenance Initial setting Select "Service" with the [Cursor] buttons ( ) or the [Page] buttons ( Service ), and press the button. Main display: Cursor Page...

  • Page 43: Disassembly Procedure

    DISASSEMBLY PROCEDURE PLA-M35EA.UK PLA-M50EA.UK PLA-M60EA.UK PLA-M71EA.UK PLA-M100EA.UK PLA-M125EA.UK PLA-M140EA.UK Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS/FIGURES Figure 1 1. Removing the filter Knob Air intake grille (1) Slide the knob of air intake grille toward the arrow to Grille open the air intake grille.
  • Page 44 OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the room temperature thermistor (TH1) Photo 3 (1) Remove the electrical box cover. (See Photo 1 and 2) (2) Disconnect the connector CN20 (Red) from the indoor Thermistor (TH1) Electrical box controller board. Indoor controller (3) Remove the room temperature thermistor with its holder.
  • Page 45 Be careful when removing heavy parts. OPERATING PROCEDURE PHOTOS/FIGURES Photo 5 6. Removing the electrical box Bell mouth fixing screws (1) Remove the electrical box cover (See Photo 1 and 2) and the connectors (Refer to procedure 5). (2) Remove the electrical box fixing screws (M5×10: 2 screw).
  • Page 46 OPERATING PROCEDURE PHOTOS/FIGURES Photo 9 8. Removing the fan motor (MF) (1) Remove the turbo fan. (See Photo 6 and refer to procedure 7) Nuts and washers (2) Remove the lead cover (tapping screw 4×10: 2 screws). Rubber mounts (See Photo 9) (3) Loosen the 2 clamps.
  • Page 47 OPERATING PROCEDURE PHOTOS/FIGURES 10. Removing the drain pan Photo 12 (1) Remove the electrical box. (See photo 3 and refer to procedure 6) (2) Remove the bell mouth (tapping screw 4×10 : 2 screws). Drain pan (See Photo 5) (3) Remove the drain pan (screw M5×10: 4 screws). Drain pan fixing screws Drain pan...
  • Page 48 OPERATING PROCEDURE PHOTOS/FIGURES Photo 14 12. Removing the drain pump (DP) (1) Remove the drain pan. (Refer to procedure 10) (2) Cut the hose band and remove the hose. Drain pump Float switch (3) Loosen the clamp of the drain pump. (4) Remove the drain pump (tapping screw 4×10: 2 screws/2 hooks).
  • Page 49 OPERATING PROCEDURE PHOTOS/FIGURES 13. Removing the float switch (FS) Photo 15 (1) Remove the drain pan. (Refer to procedure 10) (2) Loosen the clamp of the drain pump. (See Photo 14) (3) Remove the float switch (tapping screw 4×10: 1 screw/1 Do not hold this floating part hook).
  • Page 50 HEAD OFFICE : TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2018 MITSUBISHI ELECTRIC CORPORATION Published: Nov. 2018 No.OCH697 Specifications are subject to change without notice. Made in Japan...
  • Page 51 Related Links Model Number: PLA-M50EA PLA-M-R32 Single Phase Product Information Sheet PLA-M35-100EA Declaration of Conformity (CE2018C15) PLA-M35-140EA Installation Manual (GG79D015W01) PLA-M35-140EA Operational Manual (GG79D014W01) PLA-M35-140EA Parts Catalogue (OCB697) PLA-M35-140EA Service Manual (OCH697)

This manual is also suitable for:

Pla seriesPla-m50eaPla-m60eaPla-m71eaPla-m100eaPla-m125ea ... Show all

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